Directional characterization of a location of a target device makes use of multiple radio transmissions that are received from the target device. In some examples, each radio transmission is received at a first antenna at a fixed location, and is also received at a second moving antenna. The received transmissions are combined to determine the directional characterization, for example, as a distribution of power as a function of direction. In some examples, the received radio transmissions are processed to determine, for each of a plurality of directions of arrival of the radio transmissions, a most direct direction of arrival, for example, to distinguish a direct path from a reflected path from the target.

Directional characterization of a location of a target device makes use of multiple radio transmissions that are received from the target device. In some examples, each radio transmission is received at a first antenna at a fixed location, and is also received at a second moving antenna. The received transmissions are combined to determine the directional characterization, for example, as a distribution of power as a function of direction. In some examples, the received radio transmissions are processed to determine, for each of a plurality of directions of arrival of the radio transmissions, a most direct direction of arrival, for example, to distinguish a direct path from a reflected path from the target.

Systems and methods are disclosed herein which facilitate generating and utilizing look-up tables for determining an AoA of a radar signal received from an emitter. In example embodiments, the systems and methods may involve a selectivity process for selecting, for each of a plurality of installation positions, an installation-representative antenna pattern as selected from an option set. Thus, the selectivity process may, for example, include indexing a plurality of data sets of antenna patterns associated with an antenna position and selecting a most representative data set from at least one of the indexed data sets. In some embodiments, the system and methods may further apply a compression algorithm which identifies changes in slope with respect to adjacent pairs of antenna positions (vertex pairs) in the look-up table. The algorithm may then discard any antenna position (any vertex) that does not meet a slope difference threshold with respect to changes in the slope.

A communication device mounting position determination system and apparatus are provided configured to limit where a device can be installed in a vehicle. An ECU transmits an LF signal from an LF antenna to sensor units. The sensor units receive and detect the signal strength. The sensor units transmit a UHF signal to the ECU having information including the signal strength of the LF signal. The ECU detects the signal strength of the UHF signals. For example, on the basis of the signal strength of the LF signal, the ECU makes a determination as to which of the wheels is the transmission source of the UHF signal, with respect to the left-right direction of the body of the vehicle. Further, on the basis of the signal strength of the UHF signal received by the ECU, the ECU makes the determination with respect to the front-rear direction of the vehicle.

The present invention is directed towards a navigation device (12) for receiving navigation data from a portable computing device (11). The navigation device (12) comprises a display (21) and at least one sensor (22, 23, 24) configured to determine a reference direction, the reference direction being a direction relative to the display (21). The navigation device (12) further comprises wireless communication means (25) for wirelessly receiving data relating to a desired bearing from a portable computing device (11) and a processing unit connected to the display (21), the at least one sensor (22, 23, 24) and the wireless communication means (25). The processing unit is configured to receive a desired bearing from the wireless communication means (25); receive the reference direction from the at least one sensor (22, 23, 24); determine a desired direction based upon the reference direction and desired bearing; and operate the display (21) to display an indicium for indicating the desired direction relative to the display (21). The navigation device (12) is particularly suitable for mounting on bicycles.

The present invention is directed towards a navigation device (12) for receiving navigation data from a portable computing device (11). The navigation device (12) comprises a display (21) and at least one sensor (22, 23, 24) configured to determine a reference direction, the reference direction being a direction relative to the display (21). The navigation device (12) further comprises wireless communication means (25) for wirelessly receiving data relating to a desired bearing from a portable computing device (11) and a processing unit connected to the display (21), the at least one sensor (22, 23, 24) and the wireless communication means (25). The processing unit is configured to receive a desired bearing from the wireless communication means (25); receive the reference direction from the at least one sensor (22, 23, 24); determine a desired direction based upon the reference direction and desired bearing; and operate the display (21) to display an indicium for indicating the desired direction relative to the display (21). The navigation device (12) is particularly suitable for mounting on bicycles.

A method, device, system and use for determining a distance, location and/or orientation including the at least relative determination of a position of at least one object using at least two active anchors. A first signal is emitted by a first of the two anchors and is received at the object and by a second of said two anchors. A phase measurement is performed at said second anchor and wherein a distance determination with respect to said first anchor is performed and/or the distance from said first anchor to said second anchor is known. A second, particularly electromagnetic, signal is emitted from said second anchor, and information on phase measurement and distance between said first and second anchors is made available to a computation unit and at least one phase measurement respectively of said first and second signal is performed at said object and made available to said computation unit.

A radar architecture comprising a computing device having a DC subtraction module, programmed to average a first value of a first pixel from a first received SAR image and a second value of a second pixel from a second received SAR image, to produce an averaged value, and to subtract the averaged value from the first value, resulting in a first DC subtracted pixel value, and to subtract the averaged value from the second value, resulting in a second DC subtracted pixel value; a DFT processing module programmed to receive the first DC subtracted pixel value and the second DC subtracted pixel value and to output a first DFT output comprising a plurality Doppler bins; and a detector module programmed to determine if the output of the DFT represents the presence of a target, and to estimate range-rate via a lookup table.

A method comprises determining, based on at least one radio frequency packet passed wirelessly between first and second devices using an array of plural antennas provided in one of the first and second devices, an orientation of the second device with respect to the first device and, if the orientation satisfies a predetermined criterion, controlling operation of the first device.

A method comprises determining, based on at least one radio frequency packet passed wirelessly between first and second devices using an array of plural antennas provided in one of the first and second devices, an orientation of the second device with respect to the first device and, if the orientation satisfies a predetermined criterion, controlling operation of the first device.